how to check existency of a field in mvc -c#.net

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Hi all

Iam new to MVC Pattern.I want to check a field exist or not.

C#

@Html.TextBoxFor(m => m.employeeid)
@Html.ValidationMessageFor(m => m.employeeid)

When i entered a employee code in textbox want to show msg as id exist if its already exist in database.

How to do this in mvc using any client side scripting ??

Thanks in Advance
Amritha

Posted 27-Feb-14 0:43am

amritha444

Updated 27-Feb-14 1:49am

Sampath Lokuge

v2

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Sampath Lokuge 27-Feb-14 7:51am

Are you using jQuery ?

1 solution

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Sampath Lokuge · Answer 1 · 2014-02-27T03:22:00

You can use jQuery ajax for this.

Note:Just a guidance.Change it according to your scenario.

JS

$.ajax({
              url: "/Portal/IsEmployeeExist",
              type: 'Get',
              dataType: "json",
              cache: false,
              data: { empId: passYourEmpId},
              success: function (data) {
                  if (!data) {
                      //your message
                  }
              },
              error: function (xhr, ajaxOptions, thrownError) {
                  //
              }
          });

Action method

C#

[HttpGet]
       public JsonResult IsEmployeeExist(string empId)
       {
           var isEmployeeExist = //here do your db validation and return true or false;

           return Json(isEmployeeExist, JsonRequestBehavior.AllowGet);
       }

Here is the nice Video about that : Evolving Practices in Using jQuery and Ajax in ASP.NET MVC Applications